That is, the total number of winners in Pinghe District, Donghe District and Beihe District.
1/3 * 1/24 * x+2/7 * 1/ 16 * x+ 1/5 * 1/ 18 * x = xy *( 1- 1/7)
Y=0.05 is obtained by eliminating the X solution on both sides of the equation.
According to the denominators 72, 56 and 90 in the above formula, find their common multiples and take values between 2000 and 3000.
The total is 2520.